Carr,, Stephen J.
Technology for small-scale farmers in Sub-Saharan Africa : experience with food crop production in five major ecological zones / Stephen J. Carr
Technology for small-scale farmers in Sub-Saharan Africa : experience with food crop production in five major ecological zones / Stephen J. Carr
. - Washington : The World Bank, 1989
. - XIII, 106 p. 28 cm
. - (World Bank technical paper; 109)
630.1(6)